An OLT of a PON obtains information on discontinuous reception of a UE from a BBU of LTE, and adjusts a sleep start timing and a sleep cycle of an ONU so that a recovery waiting time in the OLT with respect to downlink data transmitted from the BBU to the UE can be minimized.
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1. An optical wireless access system in which a plurality of Optical Network Units (ONUs) are connected to an Optical Line Terminal (OLT) using optical transmission paths, and downlink data is transmitted from a baseband signal processing portion connected to the OLT to an RF signal transmitting/receiving portion connected to the ONU, wherein the OLT obtains information on discontinuous reception of a wireless terminal, wirelessly connected to the RF signal transmitting/receiving portion, from the baseband signal processing portion and performs sleep control of the ONU based on the information.
An optical wireless access system connects multiple ONUs (Optical Network Units) to an OLT (Optical Line Terminal) via optical links. Downlink data flows from a baseband processing unit (like a BBU in LTE), which connects to the OLT, to an RF transceiver, which connects to the ONU. The OLT intelligently manages the ONUs' sleep cycles. It obtains information about the discontinuous reception (DRX) schedule of wireless terminals (like phones) connected to the RF transceiver from the baseband unit. Based on this DRX information, the OLT controls when each ONU enters and exits sleep mode.
2. The optical wireless access system according to claim 1 , wherein the OLT has a wireless communication information read-in portion obtaining the information on the discontinuous reception of the wireless terminal from the baseband signal processing portion, and wherein the wireless communication information read-in portion is connected to the baseband signal processing portion by using a line different from the downlink data.
The optical wireless access system described where the OLT obtains discontinuous reception (DRX) information from the baseband unit, includes a dedicated "wireless communication information read-in portion". This component retrieves the DRX data from the baseband unit using a separate communication channel, distinct from the primary channel used for transmitting the actual downlink data. This ensures that control signaling related to DRX doesn't interfere with the data transmission path.
3. The optical wireless access system according to claim 1 , wherein the OLT has a wireless communication information read-in portion obtaining the information on the discontinuous reception of the wireless terminal from the baseband signal processing portion, and wherein the wireless communication information read-in portion is connected to the baseband signal processing portion by using a line common to the downlink data and identifies the downlink data and the information on the discontinuous reception on the wireless terminal using a control protocol.
The optical wireless access system where the OLT obtains discontinuous reception (DRX) information from the baseband unit, includes a "wireless communication information read-in portion" that obtains DRX information from the baseband unit. However, unlike the previous description, this component shares the same communication channel as the downlink data. To differentiate between the data and the DRX information, a control protocol is used. This protocol defines specific message formats or flags to identify which packets contain downlink data and which contain the DRX information for the wireless terminals.
4. The optical wireless access system according to any one of claims 1 to 3 , further comprising a controller which calculates a sleep start timing and a sleep cycle of the ONU so that a recovery waiting time in the OLT with respect to the downlink data can be reduced using the obtained information on the discontinuous reception.
The optical wireless access system described, featuring OLT-controlled ONU sleep cycles based on wireless terminal DRX information, also includes a "controller". This controller uses the obtained DRX information to calculate the optimal sleep start time and sleep cycle duration for each ONU. The goal of this calculation is to minimize the amount of time the OLT has to wait to transmit downlink data when a wireless terminal wakes up from its discontinuous reception (DRX) cycle, thereby improving overall system latency. The controller utilizes DRX parameters to fine-tune ONU sleep patterns.
5. The optical wireless access system according to any one of claims 1 to 3 , wherein the OLT further comprises a controller which sets a sleep cycle time, a recovery cycle time, or the sum of them of the ONU to respective values that are the same as or the integer times a pause cycle time of the discontinuous reception of the wireless terminal, a recovery cycle time of the discontinuous reception of the wireless terminal, or the sum of them, using the obtained information on the discontinuous reception.
The optical wireless access system featuring OLT-controlled ONU sleep cycles based on wireless terminal DRX information, includes a controller that intelligently sets the sleep cycle time, the recovery cycle time, or the combined sleep and recovery cycle time of the ONU. These times are set to be equal to or integer multiples of the wireless terminal's discontinuous reception (DRX) pause cycle time, recovery cycle time, or the sum of those times. By synchronizing the ONU sleep cycle with the terminal's DRX cycle, the system ensures efficient power usage and reduces latency.
6. The optical wireless access system according to any one of claims 1 to 3 , wherein the OLT further comprises a controller which starts sleep of the ONU when going back in transmission delay time from the ONU to the wireless terminal from a pause start timing of the wireless terminal, using the obtained information on the discontinuous reception.
The optical wireless access system featuring OLT-controlled ONU sleep cycles based on wireless terminal DRX information, includes a controller which initiates the ONU's sleep mode based on the wireless terminal's discontinuous reception (DRX) pause start time. The controller calculates the appropriate sleep start time for the ONU by subtracting the transmission delay (time it takes data to travel from the ONU to the wireless terminal) from the terminal's DRX pause start time. This ensures that the ONU enters sleep just before the wireless terminal enters its DRX sleep state.
7. The optical wireless access system according to any one of claims 1 to 3 , wherein the OLT further comprises a controller which recovers the ONU when going back in transmission delay time from the ONU to the wireless terminal from a recovery time of the wireless terminal, using the obtained information on the discontinuous reception.
The optical wireless access system featuring OLT-controlled ONU sleep cycles based on wireless terminal DRX information, includes a controller which reactivates the ONU from its sleep mode based on the wireless terminal's discontinuous reception (DRX) recovery time. The controller calculates the appropriate wake-up time for the ONU by subtracting the transmission delay (time it takes data to travel from the ONU to the wireless terminal) from the terminal's DRX recovery time. This ensures that the ONU is ready to transmit data when the wireless terminal exits its DRX sleep state.
8. An OLT used in an optical wireless access system in which a plurality of ONUs are connected to the OLT using optical transmission paths, and downlink data is transmitted from a baseband signal processing portion connected to the OLT to an RF signal transmitting/receiving portion connected to the ONU, wherein the OLT obtains information on discontinuous reception of a wireless terminal, wirelessly connected to the RF signal transmitting/receiving portion, from the baseband signal processing portion and performs sleep control of each of the ONUs based on the information.
An OLT (Optical Line Terminal) manages multiple ONUs (Optical Network Units) connected via optical links. It receives downlink data from a baseband processing unit. The OLT intelligently controls the sleep cycles of each ONU based on information about the discontinuous reception (DRX) schedule of wireless terminals connected to those ONUs. The OLT obtains this DRX information from the baseband processing unit. This allows the OLT to optimize power consumption by putting ONUs into sleep mode when the associated wireless terminals are in DRX mode.
9. The OLT according to claim 8 comprising a wireless communication information read-in portion obtaining the information on the discontinuous reception of the wireless terminal from the baseband signal processing portion, wherein the wireless communication information read-in portion is connected to the baseband signal processing portion by using a line different from the downlink data.
The OLT that manages ONU sleep cycles based on wireless terminal DRX information, has a dedicated "wireless communication information read-in portion". This component retrieves the DRX data from the baseband unit using a separate communication channel, distinct from the primary channel used for transmitting the actual downlink data. This dedicated channel ensures that the control signaling related to DRX doesn't interfere with the data transmission path.
10. The OLT according to claim 8 comprising a wireless communication information read-in portion obtaining the information on the discontinuous reception of the wireless terminal from the baseband signal processing portion, wherein the wireless communication information read-in portion is connected to the baseband signal processing portion by using a line common to the downlink data and identifies the downlink data and the information on the discontinuous reception of the wireless terminal using a control protocol.
The OLT that manages ONU sleep cycles based on wireless terminal DRX information, uses a "wireless communication information read-in portion" to obtain DRX information from the baseband unit. This component shares the same communication channel as the downlink data. To differentiate between the data and the DRX information, a control protocol is used. This protocol defines specific message formats or flags to identify which packets contain downlink data and which contain the DRX information for the wireless terminals.
11. The OLT according to any one of claims 8 to 10 , further comprising a controller which calculates a sleep start timing and a sleep cycle of the ONU so that a recovery waiting time in the OLT with respect to the downlink data can be reduced using the obtained information on the discontinuous reception.
The OLT, managing ONU sleep based on wireless DRX info, includes a controller calculating optimal ONU sleep/wake timings. This controller utilizes DRX info to reduce OLT wait times for downlink data delivery after an ONU's sleep. It calculates a sleep start time and duration to improve system responsiveness.
12. The OLT according to any one of claims 8 to 10 , further comprising a controller which sets a sleep cycle time of the ONU, a recovery cycle time of the ONU, or the sum of them to respective values that are the same as or the integer times a pause cycle time of the discontinuous reception of the wireless terminal, a recovery cycle time of the discontinuous reception of the wireless terminal, or the sum of them, using the obtained information on the discontinuous reception.
The OLT, managing ONU sleep based on wireless DRX info, has a controller setting ONU sleep and recovery cycle times. These are set equal to or as integer multiples of the wireless terminal's pause and recovery cycle times, or their sum. The goal is to synchronize ONU and wireless terminal sleep cycles.
13. The OLT according to any one of claims 8 to 10 , further comprising a controller which starts sleep of the ONU when going back in transmission delay time from the ONU to the wireless terminal from a pause start timing of the wireless terminal, using the obtained information on the discontinuous reception.
The OLT that manages ONU sleep cycles based on wireless terminal DRX, includes a controller which starts the ONU's sleep based on the wireless terminal's DRX pause start time. The controller calculates the ONU's sleep start time by subtracting transmission delay from terminal's pause start, putting the ONU to sleep before the terminal enters DRX.
14. The OLT according to any one of claims 8 to 10 , further comprising a controller which recovers the ONU when going back in transmission delay time from the ONU to the wireless terminal from a recovery time of the wireless terminal, using the obtained information on the discontinuous reception.
The OLT that manages ONU sleep cycles based on wireless terminal DRX, contains a controller recovering the ONU from sleep based on the wireless terminal's DRX recovery time. The controller calculates the ONU's wake-up by subtracting transmission delay from terminal's recovery time, waking the ONU just before terminal exits DRX.
15. A sleep control method in an optical wireless access system in which a plurality of ONUs are connected to an OLT using optical transmission paths, and downlink data is transmitted from a baseband signal processing portion connected to the OLT to an RF signal transmitting/receiving portion connected to the ONU, wherein the OLT obtains information on discontinuous reception of a wireless terminal, wirelessly connected to the RF signal transmitting/receiving portion, from the baseband signal processing portion and performs sleep control of each of the ONUs based on the information.
A method for controlling sleep cycles in an optical wireless access system. The system connects ONUs to an OLT, which receives downlink data from a baseband unit. The OLT obtains discontinuous reception (DRX) information of wireless terminals from the baseband unit and uses this data to intelligently control the sleep cycles of each ONU. This optimizes power consumption by putting ONUs into sleep when their associated terminals are in DRX.
16. The sleep control method according to claim 15 , wherein in the sleep control of each of the ONUs, the information on the discontinuous reception of the wireless terminal is obtained from the baseband signal processing portion, using a line different from the downlink data.
The sleep control method for an optical wireless access system, where the OLT gets DRX data from the baseband unit, involves using a dedicated communication channel for the DRX information, separate from the downlink data channel. This ensures DRX control signals don't interfere with regular data transmission.
17. The sleep control method according to claim 15 , wherein in the sleep control of each of the ONUs, the information on the discontinuous reception of the wireless terminal is obtained by identifying the downlink data and wherein the information on the discontinuous reception of the wireless terminal is obtained using a control protocol from among information obtained from the baseband signal processing portion by using a line common to the downlink data.
The sleep control method obtains DRX information from the baseband unit using the same channel as downlink data. A control protocol identifies data packets containing downlink data versus packets containing DRX info.
18. The sleep control method according to any one of claims 15 to 17 , wherein in the sleep control of each of the ONUs, a sleep start timing and a sleep cycle of the ONU are calculated so that a recovery waiting time in the OLT with respect to the downlink data can be reduced using the obtained information on the discontinuous reception.
The sleep control method, using OLT to manage ONU sleep based on wireless DRX info, calculates optimal ONU sleep timings. This calculation is done to reduce latency that the OLT experiences waiting for the ONU to wake up when data needs to be sent to a wireless terminal.
19. The sleep control method according to any one of claims 15 to 17 , wherein in the sleep control of each of the ONUs, values of a sleep cycle time of the ONU, a recovery cycle time of the ONU, or the sum of them are set to respective values that are the same as or the integer times a pause cycle time of the discontinuous reception of the wireless terminal, a recovery cycle time of the discontinuous reception of the wireless terminal, or the sum of them, using the obtained information on the discontinuous reception.
The sleep control method, uses OLT to manage ONU sleep with settings synchronized to the wireless terminals DRX schedule. The ONU's sleep/wake times are set to match or scale to the wireless terminal, improving power efficiency.
20. The sleep control method according to any one of claims 15 to 17 , wherein in the sleep control of each of the ONUs, sleep of the ONU is started when going back in transmission delay time from the ONU to the wireless terminal from a pause start timing of the wireless terminal, using the obtained information on the discontinuous reception.
The sleep control method, uses OLT to initiate ONU sleep based on wireless terminal DRX schedule. The ONU sleep is calculated by subtracting transmission delay from the terminal pause.
21. The sleep control method according to any one of claims 15 to 17 , wherein in the sleep control of each of the ONUs, the ONU is recovered when going back in transmission delay time from the ONU to the wireless terminal from a recovery time of the wireless terminal, using the obtained information on the discontinuous reception.
The sleep control method, uses OLT to recover ONU from sleep based on wireless terminal DRX schedule. The ONU is recovered when transmission delay is subtracted from the terminal's recovery time.
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September 25, 2013
June 27, 2017
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